Communication method and communication device

Abstract

The invention provides a communication method and a communication device, and the method comprises the steps: receiving a first MAC-CE signaling, the first MAC-CE being used for indicating at most two TCI-state groups corresponding to at least one TCI field value; when a first condition is met, two TCI-state groups are determined, the two TCI-state groups comprise the TCI-state group of the first TRP and the TCI-state group of the second TRP, and the first condition comprises one or more of the following conditions: not all TCI field values in the at least one TCI field value correspond to the TCI-state of the same TRP, and the terminal equipment currently adopts the TCI-state group of the first TRP or the TCI-state group of the second TRP to perform data transmission; and the two TCI-state groups are adopted to carry out data transmission.

Description

Technical Field

[0001] The present application relates to the field of communications, and in particular, to a communication method and a communication device. Background Art

[0002] The network device indicates the relevant information of the transmission beam to the terminal device through the transmission configuration index (TCI) state (TCI-state) information. The network device can indicate the TCI-state of one or two transmission points (Transmission and Receiving Point, TRP) to the terminal device. After the terminal device receives the TCI-state of one or two TRPs, it uses the TCI-state of one or two TRPs to replace the currently used TCI-state.

[0003] For example, if the network device indicates the TCI-state of a single TRP, the terminal device adopts the TCI-state of the TRP indicated this time to replace the TCI-state currently used by the TRP, and the TCI-state of the other TRP remains unchanged; if the network device indicates the TCI-state of two TRPs, the terminal device adopts the TCI-state of the two TRPs indicated this time to replace the TCI-state currently used by the two TRPs respectively.

[0004] The above beam update method is only applicable to the situation where the terminal device currently uses the TCI-state of two TRPs. If the terminal device currently only uses the TCI-state of a single TRP, the above method is not applicable. Summary of the invention

[0005] The present application provides a communication method and a communication device. If the current terminal device only uses the TCI-state of a single TRP (that is, it is currently in a single TRP transmission mode), if the TCI-state of two TRPs is indicated for the terminal device, it can switch to a multi-TRP transmission mode.

[0006] In a first aspect, a communication method is provided, which can be executed by a terminal device, or can also be executed by a component (such as a chip or circuit) of the terminal device, without limitation. For ease of description, the following description is based on an example of execution by a terminal device.

[0007] The method may include: receiving a first medium access control-control unit MAC-CE signaling, the first MAC-CE is used to indicate a transmission configuration indication-state TCI-state corresponding to at least one transmission configuration indication TCI field value, wherein each TCI field value in the at least one TCI field value corresponds to at most two TCI-state groups, and each TCI-state group corresponds to a transmission point TRP; when a first condition is met, two TCI-state groups are determined by a first method or a second method, and the two TCI-state groups include a TCI-state group of a first TRP and a TCI-state group of a second TRP; the two TCI-state groups are used for data transmission; wherein the first condition includes a combination of one or more of the following conditions: the at least one TCI field value includes at least one first TCI field value and at least one second TCI field value, the TCI-state group corresponding to the first TCI field value includes a TCI-state group corresponding to the first TRP, the TCI-state group corresponding to the second TRP includes a TCI-state group corresponding to the second TRP, and the terminal device currently uses the TCI-state group corresponding to the first TRP or the second TRP for data transmission.

[0008] Each TCI-state group includes an uplink and downlink TCI-state, or each TCI-state group includes an uplink TCI-state and / or a downlink TCI-state.

[0009] Based on the above technical solution, if the current terminal device only uses the TCI-state of a single TRP (that is, it is currently in a single TRP transmission mode), if the TCI-state of two TRPs is indicated to the terminal device, the terminal device can determine the TCI-state of the two TRPs and use the TCI-state of the two TRPs for data transmission, thereby switching to a multi-TRP transmission mode.

[0010] In combination with the first aspect, in certain implementations of the first aspect, the terminal device currently uses the TCI-state group of the first TRP or the second TRP for data transmission, including: the terminal device currently uses an uplink and downlink TCI-state of the first TRP for data transmission, or, the terminal device currently uses an uplink TCI-state and / or a downlink TCI-state of the first TRP for data transmission; or, the terminal device currently uses an uplink and downlink TCI-state of the second TRP for data transmission, or, the terminal device currently uses an uplink TCI-state and / or a downlink TCI-state of the second TRP for data transmission.

[0011] In combination with the first aspect, in certain implementations of the first aspect, the use of the two TCI-state groups for data transmission includes: using one uplink and downlink TCI-state of the first TRP for data transmission, or using one uplink TCI-state and / or one downlink TCI-state of the first TRP for data transmission; and using one uplink and downlink TCI-state of the second TRP for data transmission, or using one uplink TCI-state and / or one downlink TCI-state of the second TRP for data transmission.

[0012] In one possible implementation method, the first method is: determine at least one third TCI field value, the TCI-state group corresponding to the third TCI field value includes the TCI-state group of the first TRP and the TCI-state group of the second TRP; determine that the TCI-state group of the first TRP and the TCI-state group of the second TRP corresponding to the third field value with the smallest index in the at least one third field value are the two TCI-state groups.

[0013] In one possible implementation, the second method is: determine at least one fourth TCI field value and at least one fifth TCI field value, the TCI-state group corresponding to the fourth TCI field value includes the TCI-state group corresponding to the first TRP, and the TCI-state corresponding to the fifth TCI field value includes the TCI-state group of the second TRP; determine the TCI-state group of the first TRP corresponding to the fourth field value with the smallest index in the at least one fourth field value and the TCI-state group of the second TRP corresponding to the fifth field value with the smallest index in the at least one fifth field value as the two TCI-state groups.

[0014] In a possible implementation, two TCI-state groups are determined by the first method or the second method, including: when the second condition is met, the two TCI-state groups are determined by the first method; when the second condition is not met, the two groups of TCI-states are determined by the second method; the second condition is: the at least one TCI field value includes at least one third TCI field value, and the TCI-state group corresponding to the third TCI field value includes the TCI-state group of the first TRP and the TCI-state group of the second TRP.

[0015] In a second aspect, a communication method is provided, which can be executed by a network device, or can also be executed by a component (such as a chip or circuit) of the network device, without limitation. For ease of description, the following description is based on an example of execution by a network device.

[0016] The network device currently uses the TCI-state group corresponding to the first TRP or the second TRP for data transmission. The method may include: sending a first medium access control-control unit MAC-CE signaling, the first MAC-CE is used to indicate the transmission configuration indication-state TCI-state corresponding to at least one transmission configuration indication TCI field value, wherein each TCI field value in the at least one TCI field value corresponds to at most two TCI-state groups, each TCI-state group corresponds to a transmission point TRP, the at least one TCI field value includes at least one first TCI field value and at least one second TCI field value, the TCI-state group corresponding to the first TCI field value includes the TCI-state group corresponding to the first TRP, and the TCI-state group corresponding to the second TCI field value includes the TCI-state group corresponding to the second TRP; using two TCI-state groups for data transmission, the two TCI-state groups are determined by the terminal device through the first method or the second method, and the two TCI-state groups include the TCI-state group of the first TRP and the TCI-state group of the second TRP.

[0017] Each TCI-state group includes an uplink and downlink TCI-state, or each TCI-state group includes an uplink TCI-state and / or a downlink TCI-state.

[0018] In a possible implementation, the network device currently uses the TCI-state group corresponding to the first TRP or the second TRP for data transmission, including: the network device currently uses an uplink and downlink TCI-state of the first TRP for data transmission, or the terminal device currently uses an uplink TCI-state and / or a downlink TCI-state of the first TRP for data transmission; or, the network device currently uses an uplink and downlink TCI-state of the second TRP for data transmission, or, the terminal device currently uses an uplink TCI-state and / or a downlink TCI-state of the second TRP for data transmission.

[0019] In a possible implementation, the use of the two TCI-state groups for data transmission includes: using one uplink and downlink TCI-state of the first TRP for data transmission, or using one uplink TCI-state and / or one downlink TCI-state of the first TRP for data transmission; and using one uplink and downlink TCI-state of the second TRP for data transmission, or using one uplink TCI-state and / or one downlink TCI-state of the second TRP for data transmission.

[0020] In a possible implementation, the two TCI-state groups are the TCI-state group of the first TRP and the TCI-state group of the second TRP corresponding to the third field value with the smallest index in at least one third field value, and the TCI-state group corresponding to the third TCI field value includes the TCI-state group of the first TRP and the TCI-state group of the second TRP.

[0021] In a possible implementation, the two TCI-state groups are the TCI-state group of the first TRP corresponding to the fourth field value with the smallest index among at least one fourth field value and the TCI-state group of the second TRP corresponding to the fifth field value with the smallest index among at least one fifth field value, the TCI-state group corresponding to the fourth TCI field value includes the TCI-state group corresponding to the first TRP, and the TCI-state corresponding to the fifth TCI field value includes the TCI-state group of the second TRP.

[0022] According to a third aspect, a communication device is provided, including: a transceiver unit for receiving a first medium access control-control unit MAC-CE signaling, wherein the first MAC-CE is used to indicate a transmission configuration indication-state TCI-state corresponding to at least one transmission configuration indication TCI field value, wherein each TCI field value in the at least one TCI field value corresponds to at most two TCI-state groups, and each TCI-state group corresponds to a transmission point TRP; a processing unit for determining two TCI-state groups by a first method or a second method, the two TCI-state groups including the TCI-state group of the first TRP and the TCI-state group of the second TRP; the transceiver unit is also used to use the TCI-state group of the first TRP or the second TRP for data transmission; the transceiver unit is also used to use the two TCI-state groups for data transmission.

[0023] Each TCI-state group includes an uplink and downlink TCI-state, or each TCI-state group includes an uplink TCI-state and / or a downlink TCI-state.

[0024] In a possible implementation, the transceiver unit is also used to use the TCI-state group of the first TRP or the second TRP for data transmission, including: the transceiver unit is also used to use an uplink and downlink TCI-state of the first TRP for data transmission, or the transceiver unit is also used to use an uplink TCI-state and / or a downlink TCI-state of the first TRP for data transmission; or, the transceiver unit is also used to use an uplink and downlink TCI-state of the second TRP for data transmission, or the transceiver unit is also used to use an uplink TCI-state and / or a downlink TCI-state of the second TRP for data transmission.

[0025] In a possible implementation, the transceiver unit is also used to use the two TCI-state groups for data transmission, including: the transceiver unit is also used to use an uplink and downlink TCI-state of the first TRP for data transmission, or the transceiver unit is also used to use an uplink TCI-state and / or a downlink TCI-state of the first TRP for data transmission; and the transceiver unit is also used to use an uplink and downlink TCI-state of the second TRP for data transmission, or the transceiver unit is also used to use an uplink TCI-state and / or a downlink TCI-state of the second TRP for data transmission.

[0026] In a possible implementation, the first method is: determining at least one third TCI field value, the TCI-state group corresponding to the third TCI field value includes the TCI-state group of the first TRP and the TCI-state group of the second TRP; determining that the TCI-state group of the first TRP and the TCI-state group of the second TRP corresponding to the third field value with the smallest index in the at least one third field value are the two TCI-state groups.

[0027] In one possible implementation, the second method is: determining at least one fourth TCI field value and at least one fifth TCI field value, the TCI-state group corresponding to the fourth TCI field value includes the TCI-state group corresponding to the first TRP, and the TCI-state corresponding to the fifth TCI field value includes the TCI-state group of the second TRP; determining the TCI-state group of the first TRP corresponding to the fourth field value with the smallest index in the at least one fourth field value and the TCI-state group of the second TRP corresponding to the fifth field value with the smallest index in the at least one fifth field value as the two TCI-state groups.

[0028] In one possible implementation, when the second condition is met, the processing unit determines the two TCI-state groups through the first method; when the second condition is not met, the processing unit determines the two TCI-state groups through the second method; the second condition is: the at least one TCI field value includes at least one third TCI field value, and the TCI-state group corresponding to the third TCI field value includes the TCI-state group of the first TRP and the TCI-state group of the second TRP.

[0029] In a fourth aspect, a communication device is provided, comprising: a transceiver unit for sending a first medium access control-control unit MAC-CE signaling, wherein the first MAC-CE is used to indicate a transmission configuration indication-state TCI-state corresponding to at least one transmission configuration indication TCI field value, wherein each TCI field value in the at least one TCI field value corresponds to at most two TCI-state groups, each TCI-state group corresponds to a transmission point TRP, and the at least one TCI field value includes at least one first TCI field value and at least one second TCI field value. The TCI-state group corresponding to the first TCI field value includes the TCI-state group corresponding to the first TRP, and the TCI-state group corresponding to the second TCI field value includes the TCI-state group corresponding to the second TRP. The transceiver unit is also used to use two TCI-state groups for data transmission, and the two TCI-state groups are determined by the terminal device through the first method or the second method, and the two TCI-state groups include the TCI-state group of the first TRP and the TCI-state group of the second TRP.

[0030] In a possible implementation manner, each TCI-state group includes an uplink TCI-state and a downlink TCI-state, or each TCI-state group includes an uplink TCI-state and / or a downlink TCI-state.

[0031] In a possible implementation, the transceiver unit is also used to currently use the TCI-state group corresponding to the first TRP or the second TRP for data transmission, including: the transceiver unit is also used to use an uplink and downlink TCI-state of the first TRP for data transmission, or the terminal device currently uses an uplink TCI-state and / or a downlink TCI-state of the first TRP for data transmission; or, the transceiver unit is also used to use an uplink and downlink TCI-state of the second TRP for data transmission, or the terminal device currently uses an uplink TCI-state and / or a downlink TCI-state of the second TRP for data transmission.

[0032] In a possible implementation, the transceiver unit is also used to use the two TCI-state groups for data transmission, including: the transceiver unit is also used to use one uplink and downlink TCI-state of the first TRP for data transmission, or, use one uplink TCI-state and / or one downlink TCI-state of the first TRP for data transmission; and the transceiver unit is also used to use one uplink and downlink TCI-state of the second TRP for data transmission, or, use one uplink TCI-state and / or one downlink TCI-state of the second TRP for data transmission.

[0033] In a possible implementation, the two TCI-state groups are the TCI-state group of the first TRP and the TCI-state group of the second TRP corresponding to the third field value with the smallest index in at least one third field value, and the TCI-state group corresponding to the third TCI field value includes the TCI-state group of the first TRP and the TCI-state group of the second TRP.

[0034] In a possible implementation, the two TCI-state groups are the TCI-state group of the first TRP corresponding to the fourth field value with the smallest index among at least one fourth field value and the TCI-state group of the second TRP corresponding to the fifth field value with the smallest index among at least one fifth field value, the TCI-state group corresponding to the fourth TCI field value includes the TCI-state group corresponding to the first TRP, and the TCI-state corresponding to the fifth TCI field value includes the TCI-state group of the second TRP.

[0035] In a fifth aspect, a wireless communication device is provided, comprising modules or units for executing the method in the first aspect or any possible implementation manner of the first aspect.

[0036] In a sixth aspect, a wireless communication device is provided, comprising modules or units for executing the method in the second aspect or any possible implementation manner of the second aspect.

[0037] In a seventh aspect, a communication device is provided, including a processor, the processor is coupled to a memory, and can be used to perform any of the first aspect or the second aspect, and the method in any possible implementation of the above aspects. In a possible implementation, the communication device also includes a memory. In a possible implementation, the communication device also includes a communication interface, the processor is coupled to the communication interface. In a possible implementation, the communication device also includes a communication interface, the processor is coupled to the communication interface.

[0038] In one implementation, the communication device is a terminal device. When the communication device is a terminal device, the communication interface may be a transceiver, or an input / output interface. In one possible implementation, the transceiver may be a transceiver circuit. In one possible implementation, the input / output interface may be an input / output circuit.

[0039] In another implementation, the communication device is a network device. When the communication device is a network device, the communication interface may be a transceiver, or an input / output interface. In a possible implementation, the transceiver may be a transceiver circuit. In a possible implementation, the input / output interface may be an input / output circuit.

[0040] In another implementation, the communication device is a chip or a chip system. When the communication device is a chip or a chip system, the communication interface may be an input / output interface, an interface circuit, an output circuit, an input circuit, a pin or a related circuit on the chip or the chip system. The processor may also be embodied as a processing circuit or a logic circuit.

[0041] In an eighth aspect, a communication device is provided, comprising: an input circuit, an output circuit, and a processing circuit. The processing circuit is used to receive a signal through the input circuit and transmit a signal through the output circuit, so that any aspect of the first aspect or the second aspect, and any possible implementation of the above aspects are implemented.

[0042] In the specific implementation process, the above-mentioned communication device can be a chip, the input circuit can be an input pin, the output circuit can be an output pin, and the processing circuit can be a transistor, a gate circuit, a trigger, and various logic circuits. The input signal received by the input circuit can be, for example, but not limited to, received and input by a receiver, and the signal output by the output circuit can be, for example, but not limited to, output to a transmitter and transmitted by the transmitter, and the input circuit and the output circuit can be different circuits or the same circuit. In this case, the circuit is used as an input circuit and an output circuit at different times. The embodiment of the present application does not limit the specific implementation method of the processor and various circuits.

[0043] In a ninth aspect, a processing device is provided, comprising a processor and a memory. The processor is used to read instructions stored in the memory, and can receive signals through a receiver and transmit signals through a transmitter to execute any of the first aspect or the second aspect, and any possible implementation of the above aspects.

[0044] In a possible implementation, there are one or more processors and one or more memories.

[0045] In a possible implementation, the memory may be integrated with the processor, or the memory may be separately provided with the processor.

[0046] In the specific implementation process, the memory can be a non-transitory memory, such as a read-only memory (ROM), which can be integrated with the processor on the same chip or can be set on different chips respectively. The embodiments of the present application do not limit the type of memory and the setting method of the memory and the processor.

[0047] It should be understood that the relevant data interaction process, such as sending indication information, can be a process of outputting indication information from a processor, and receiving capability information can be a process of receiving input capability information from a processor. Specifically, the processed output data can be output to a transmitter, and the input data received by the processor can come from a receiver. Among them, the transmitter and the receiver can be collectively referred to as a transceiver.

[0048] The processor in the above aspects can be a chip, which can be implemented by hardware or by software. When implemented by hardware, the processor can be a logic circuit, an integrated circuit, etc.; when implemented by software, the processor can be a general-purpose processor, which is implemented by reading software codes stored in a memory. The memory can be integrated in the processor or can be located outside the processor and exist independently.

[0049] In the tenth aspect, a computer program product is provided, which includes: a computer program (also referred to as code, or instruction), which, when executed, enables a computer to execute any aspect of the first aspect or the second aspect, as well as a method in any possible implementation of the above aspects.

[0050] In the eleventh aspect, a computer-readable medium is provided, which stores a computer program (also referred to as code, or instructions). When the computer-readable medium is run on a computer, the computer executes any one of the first aspect or the second aspect, as well as any possible implementation of the above aspects.

[0051] In the twelfth aspect, a chip system is provided, including a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that a communication device equipped with the chip system executes any aspect of the above-mentioned first aspect or second aspect and the methods in possible implementation methods thereof.

[0052] Among them, the chip system may include an input circuit or interface for sending information or data, and an output circuit or interface for receiving information or data.

[0053] In a thirteenth aspect, a communication system is provided, comprising at least one of the aforementioned terminal devices and network devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a schematic diagram of an example of a communication system to which the present application is applicable.

[0055] Figure 2 It is a schematic diagram of a communication method provided in an embodiment of the present application.

[0056] Figure 3 A schematic block diagram of a communication device provided in an embodiment of the present application.

[0057] Figure 4 A schematic block diagram of another communication device provided in an embodiment of the present application.

[0058] Figure 5 A schematic block diagram of a terminal device provided in an embodiment of the present application.

[0059] Figure 6 A schematic block diagram of a network device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0060] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0061] The technical solutions of the embodiments of the present application can be applied to various communication systems, such as: Global System of Mobile communication (GSM) system, Code Division Multiple Access (CDMA) system, Wideband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, LTE Frequency Division Duplex (FDD) system, LTE Time Division Duplex (TDD), Wireless Fidelity (WIFI), Device to Device (D2D) communication system, Vehicle-to-Everything (V2X) communication system, Universal Mobile Telecommunication System (UMTS), Worldwide Interoperability for Microwave Access (WiMAX) communication system, Machine to Machine (M2M) system, Machine Type Communication (MTC) system, Internet of Things (IoT) system. things, IoT) communication system, non-terrestrial network (NTN) system, the 5th Generation (5G) system, the 6th generation (6G) system or new wireless (NR) system or future wireless communication system.

[0062] First combine Figure 1 A communication system applicable to an embodiment of the present application is briefly introduced as follows.

[0063] like Figure 1 As shown, the communication system may include at least one network device, such as Figure 1 The communication system may also include at least one terminal device, such as Figure 1The terminal device shown. The network device and the terminal device can communicate via a wireless link. In the communication system, the network device and the terminal device can use air interface resources for wireless communication, and the air interface resources may include at least one of time domain resources, frequency domain resources, code resources and space resources.

[0064] It should be understood that Figure 1 This is a simplified schematic diagram for ease of understanding only. The communication system may also include other network devices or other terminal devices. Figure 1 Not drawn in.

[0065] The terminal device in the embodiments of the present application may refer to user equipment, access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device. The terminal device may also be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a 5G network or a terminal device in a future Public Land Mobile Network (PLMN), etc., and the embodiments of the present application are not limited to this.

[0066] Among them, wearable devices can also be called wearable smart devices, which are a general term for the intelligent design and development of wearable devices for daily wear using wearable technology, such as glasses, gloves, watches, clothing and shoes. Wearable devices are portable devices that are worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also realize powerful functions through software support, data interaction, and cloud interaction. Broadly speaking, wearable smart devices include full-featured, large-sized, and independent of smartphones to achieve complete or partial functions, such as smart watches or smart glasses, as well as those that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various smart bracelets and smart jewelry for vital sign monitoring.

[0067] In addition, the terminal device can also be a terminal device in the Internet of Things (IoT) system. IoT is an important part of the future development of information technology. Its main technical feature is to connect objects to the network through communication technology, thereby realizing an intelligent network that interconnects people and machines and things.

[0068] It should be understood that the present application does not limit the specific form of the terminal device.

[0069] The network device in the embodiment of the present application may also be a device for communicating with a terminal device. The network device may be a base station (Base Transceiver Station, BTS) in a Global System of Mobile communication (GSM) system or a Code Division Multiple Access (CDMA), or a base station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) system, or an evolved base station (Evolved NodeB, eNB or eNodeB) in an LTE system, or a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or the communication device may be a relay station, an access point, a vehicle-mounted device, a wearable device, a communication device in a 5G network, or a communication device in a future evolved PLMN network, etc., and the embodiments of the present application are not limited.

[0070] It should be understood that the network device in the wireless communication system can be any device with wireless transceiver function. The device includes, but is not limited to: an evolved Node B (eNB), a radio network controller (RNC), a road side unit (RSU), a node B (NB), a base station controller (BSC), a base transceiver station (BTS), a home base station (e.g., home evolved node B, or home node B, HNB), a baseband unit (BBU), an access point (AP) in a wireless fidelity (WIFI) system, a wireless relay node, a wireless backhaul node, a transmission point (TP) or a transmission and reception point (TRP), etc. It can also be a gNB or a transmission point (TRP or TP) in a 5G (such as NR) system, or one or a group of antenna panels (including multiple antenna panels) of a base station in a 5G system, or a network node constituting a gNB or a transmission point, such as a baseband unit (BBU), or a distributed unit (DBU). The network device can also be a network-side device that provides communication services or communication control for terminal devices in the Internet of Vehicles.

[0071] The network device provides communication services for the terminal devices in the cell. The terminal devices in the cell communicate with the network device through the transmission resources allocated by the network device (for example, frequency domain resources, time domain resources, etc.). The cell may belong to a macro base station (for example, a macro eNB or a macro gNB, etc.).

[0072] To facilitate understanding of the embodiments of the present application, the terms involved in the present application are first briefly explained.

[0073] 1. Beam

[0074] The embodiment of the beam in the NR protocol can be a spatial domain filter, or a spatial filter, or a spatial domain parameter, a spatial parameter, a spatial domain setting, a spatial setting, or QCL (quasi-colocation) information, QCL assumption, QCL indication, etc. The beam can be indicated by a transmission configuration indication state (TCI-state) parameter, or by a spatial relation parameter. Therefore, in this application, the beam can be replaced by a spatial domain filter, a spatial filter, a spatial domain parameter, a spatial parameter, a spatial setting, a spatial setting, QCL information, QCL assumption, QCL indication, TCI-state (DL TCI-state, UL TCI-state), spatial relationship, etc. The above terms are also equivalent to each other. The beam can also be replaced by other terms representing the beam, which is not limited in this application.

[0075] A beam used to transmit a signal may be referred to as a transmission beam (Tx beam), and may also be referred to as a spatial domain transmission filter, a spatial transmission filter, a spatial domain transmission parameter, or a spatial transmission parameter, a spatial domain transmission setting, or a spatial transmission setting. A downlink transmission beam may be indicated by a TCI-state.

[0076] The beam used to receive the signal may be referred to as a reception beam (Rx beam), and may also be referred to as a spatial domain reception filter, a spatial reception filter, a spatial domain reception parameter, or a spatial reception parameter, a spatial domain reception setting, or a spatial reception setting. The uplink transmit beam may be indicated by a spatial relation, or an uplink TCI-state, or an SRS resource (indicating a transmit beam using the SRS). Therefore, the uplink beam may also be replaced by an SRS resource.

[0077] The transmit beam may refer to the distribution of signal strength in different directions of space after the signal is transmitted by the antenna, and the receive beam may refer to the distribution of signal strength in different directions of space of the wireless signal received from the antenna.

[0078] In addition, the beam may be a wide beam, a narrow beam, or other types of beams. The technology for forming the beam may be a beamforming technology or other technologies. The beamforming technology may specifically be a digital beamforming technology, an analog beamforming technology, or a hybrid digital / analog beamforming technology.

[0079] Beams generally correspond to resources. For example, when performing beam measurement, the network device measures different beams through different resources. The terminal device feeds back the measured resource quality, and the network device knows the quality of the corresponding beam. During data transmission, beam information is also indicated through its corresponding resources. For example, the network device indicates the terminal device's physical downlink shared channel (PDSCH) beam information through the transmission configuration indicator (TCI) resource in the downlink control information (DCI).

[0080] Optionally, multiple beams with the same or similar communication characteristics are regarded as one beam. One beam may include one or more antenna ports for transmitting data channels, control channels, and sounding signals. One or more antenna ports forming a beam may also be regarded as an antenna port set.

[0081] In the embodiments of the present application, unless otherwise specified, a beam refers to a transmission beam. In beam measurement, each beam of a network device corresponds to a resource, so the beam corresponding to the resource can be uniquely identified by the index of the resource.

[0082] 2. Resources

[0083] In beam measurement, the beam corresponding to the resource can be uniquely identified by the resource index.

[0084] The resource may be an uplink signal resource or a downlink signal resource.

[0085] The uplink signal includes, but is not limited to, a sounding reference signal (SRS) and a demodulation reference signal (DMRS).

[0086] Downlink signals include, but are not limited to, channel state information reference signal (CSI-RS), cell specific reference signal (CS-RS), user equipment specific reference signal (US-RS), demodulation reference signal (DMRS) and synchronization signal / physical broadcast channel block (SS / PBCH block). SS / PBCH block can be referred to as synchronization signal block (SSB).

[0087] Resources can be configured through radio resource control (RRC) signaling.

[0088] In the configuration structure, a resource is a data structure, including relevant parameters of the corresponding uplink / downlink signal, such as the type of uplink / downlink signal, the resource element carrying the uplink / downlink signal, the sending time and period of the uplink / downlink signal, the number of ports used to send the uplink / downlink signal, etc.

[0089] Each uplink / downlink signal resource has a unique index to identify the uplink / downlink signal resource. It is understandable that the resource index may also be referred to as the resource identifier, and the present application embodiment does not impose any limitation on this.

[0090] 3. Transmission Configuration Indication State (TCI state).

[0091] In uplink and downlink transmission, both the network device and the terminal device need to use the correct beam to achieve the best transmission. In downlink transmission, the network device needs to indicate to the terminal device the downlink transmission beam it uses, so that the terminal device knows what receiving beam to use for reception; in uplink transmission, the network device also needs to indicate to the terminal device what uplink transmission beam the terminal device needs to use, because the network device knows which beam of the terminal device is the best. Both the uplink beam and the downlink beam can be indicated by TCI-state. Specifically, the beam used for uplink transmission is indicated by the downlink TCI-state, and the beam used for uplink transmission is indicated by the uplink TCI-state. The network device indicates the specific TCI-state to the terminal device through the TCI (Transmission Configuration Index) field in the downlink control information (Downlink Control Information, DCI). The TCI field size is 3 bits, which can specifically represent 8 different field values ​​(codepoints). Each field value of the TCI field can be associated with a TCI-state index, and the TCI-state index can uniquely identify a TCI-state, which can be a downlink TCI-state or an uplink TCI-state. Each field value of the TCI field can also be associated with two TCI-state indexes, and the two TCI-state indexes can uniquely identify two TCI-states, which can be a downlink TCI-state and an uplink TCI-state.

[0092] The downlink TCI-state includes several parameters, through which the terminal device can determine the relevant information of the downlink transmit beam, and thus determine which receive beam to use. TCI-state is configured by the network device to each terminal device, and each TCI-state includes its own index TCI-State Id and two QCL-Info. QCL-Info also includes a referenced reference signal (reference Signal, RS) to indicate which reference signal forms a QCL relationship. In other words, when we say which reference signal forms a QCL relationship, we actually mean which beam forms a QCL relationship. Each QCL-Info includes a reference signal resource (referenceSignal) to indicate that the downlink transmission using the TCI-state should use the same downlink timing, frequency deviation, or receive beam as the reference signal resource. Which one it is depends on the type of the QCL-Info, that is, another field qcl-Type of the QCL-Info. qcl-Type can have four values ​​{typeA, typeB, typeC, typeD}. When the type is typeA, typeB and typeC, the downlink transmission using the TCI-state should use the same downlink timing and frequency offset information as the reference signal resource. It is not the focus of this application and will not be introduced in detail here. When the type is typeD, the downlink transmission using the TCI-state should use the same receiving beam as the reference signal resource. Of the above two QCL-info, one is of typeD and the other is of typeA or typeB or typeC. The terminal device can determine what receiving beam to use to receive the corresponding downlink transmission through the QCL-info of typeD. The specific execution steps are as follows:

[0093] 1) The network device indicates the downlink TCI-state of a downlink transmission to the terminal device through DCI (indicated by the TCI field);

[0094] 2) The terminal device determines the reference signal resource in the QCL-info of type D in the TCI-state;

[0095] 3) Determine the receiving beam corresponding to the downlink transmission as the receiving beam of the reference signal resource; note that the receiving beam of the reference signal resource has been acquired in advance through the beam management process. Through the beam management process, the terminal device can determine which receiving beam is the best to receive the reference signal resource, and use the receiving beam as the receiving beam of the reference signal resource.

[0096] Similarly, the uplink TCI-state includes a referenceSignal (reference signal resource), which is used to indicate that the uplink transmission using this TCI-state should use the same uplink transmission beam as the reference signal resource. The terminal device can determine which transmission beam to use to send the corresponding uplink transmission through the reference signal resource. In the uplink TCI-state, the reference signal resource is not included in the QCL-info, nor is the QCL type distinguished, because there is no need to refer to the uplink timing and frequency offset information, only the uplink transmission beam. The specific execution steps are as follows:

[0097] 1) The network device indicates the uplink TCI-state (indicated by the TCI field) of a downlink transmission (such as a PDSCH) to the terminal device through DCI;

[0098] 2) The terminal device determines the reference signal resources in the TCI-state;

[0099] 3) Determine the transmission beam corresponding to the uplink transmission as the transmission beam of the reference signal resource; note that the transmission beam of the reference signal resource has been acquired in advance through the beam management process.

[0100] 4. TCI-state indication

[0101] When performing downlink data transmission, the network device needs to use a specific downlink transmit beam for transmission, and the terminal device needs to use a corresponding receive beam for reception. In uplink transmission, the terminal device needs to use a specific uplink transmit beam, and the network device needs to use a corresponding receive beam for reception. In downlink transmission, the network device needs to inform the terminal device what receive beam to use for reception. In uplink transmission, the network device needs to inform the terminal device what transmit beam to use for transmission. The network device sends downlink control information (Downlink control information, DCI) signaling to the terminal device to indicate the corresponding beam for the downlink and / or uplink. Specifically, the DCI contains a TCI field, which is used to indicate the TCI-state. The terminal device can determine the corresponding beam for the uplink and / or downlink transmission based on the indicated TCI-state. There are three types of TCI-state: uplink TCI-state, downlink TCI-state, and uplink and downlink combined TCI-state. The uplink TCI-state is used to indicate the uplink transmit beam, the downlink TCI-state is used to indicate the downlink receive beam, and the uplink and downlink combined TCI-state is used to indicate the uplink transmit beam and the downlink receive beam. Whether the terminal device uses the uplink and downlink combined TCI-state or the uplink and downlink independent TCI-state (i.e., uplink TCI-state + downlink TCI-state) depends on the radio resource control (RRC) configuration. For details on how to use TCI-state to indicate the beam corresponding to the uplink and / or downlink transmission, please refer to the key term definition section and will not be repeated here.

[0102] 5. TCI-state indication in single TRP scenario

[0103] The single transmission and receiving point (TRP) scenario means that the network device is a single TRP, and the terminal device performs uplink and downlink transmission with the single TRP. When the terminal device adopts the uplink and downlink combined TCI-state, the network device indicates a combined uplink and downlink TCI-state to the terminal device for uplink and downlink transmission. When the terminal device adopts the uplink and downlink independent TCI-state (i.e., uplink TCI-state + downlink TCI-state), the network device indicates an uplink TCI-state and a downlink TCI-state to the terminal device for uplink and downlink transmission respectively.

[0104] 6. TCI-state indication in multiple TRP scenarios

[0105] The multiple TRP scenario means that the network device has two TRPs, and the terminal device performs uplink and downlink transmission with the two TRPs. When the terminal device adopts the uplink and downlink combined TCI-state, the network device indicates two uplink and downlink combined TCI-states to the terminal device, and each uplink and downlink combined TCI-state corresponds to a TRP, which is used for the terminal device to perform uplink and downlink transmission with the TRP. When the terminal device adopts the uplink and downlink independent TCI-state, the network device indicates two groups of TCI-states to the terminal device, and each group of TCI-states corresponds to a TRP, including an uplink TCI-state and a downlink TCI-state, which are used for the terminal device to perform uplink and downlink transmission with the TRP respectively.

[0106] The network device indicates the relevant information of the transmission beam to the terminal device by transmitting the configuration number TCI-state information. The network device can indicate the TCI-state of one or two TRPs to the terminal device. After the terminal device receives the TCI-state of one or two TRPs, it uses the TCI-state of one or two TRPs to replace the currently used TCI-state.

[0107] For example, if the network device indicates the TCI-state of a single TRP, the terminal device adopts the TCI-state of the TRP indicated this time to replace the TCI-state currently used by the TRP, and the TCI-state of the other TRP remains unchanged. If the network device indicates the TCI-state of two TRPs, the terminal device adopts the TCI-state of the two TRPs indicated this time to replace the TCI-state currently used by the two TRPs respectively.

[0108] The above beam update method is only applicable to the case where the terminal device currently uses two TRP TCI-states. If the terminal device currently uses only a single TRP TCI-state, the above method is not applicable. For example, when the terminal device currently uses only a single TRP TCI-state (i.e., it is currently in single TRP transmission mode), if the network device indicates two TRP TCI-states for the terminal device (i.e., it is to switch to multi-TRP transmission mode), the above beam update mechanism cannot work.

[0109] The present application provides a variety of communication methods. When the current terminal device only uses the TCI-state of a single TRP (that is, it is currently in a single TRP transmission mode), it can switch to a multi-TRP transmission mode when the network device indicates two TRP TCI-states for the terminal device.

[0110] It should be understood that the description of the specific scenarios in the embodiments of the present application is only an example. In addition to being applicable to the application scenarios described above, the methods provided in the embodiments of the present application are also applicable to application scenarios with similar problems.

[0111] In the description of the embodiments of the present application, unless otherwise specified, "multiple" or "multiple" means two or more. In addition, "at least one" can be replaced by "one or more".

[0112] The ordinal numbers such as "first" and "second" mentioned in the embodiments of the present application are used to distinguish multiple objects, and are not used to limit the size, content, order, timing, priority or importance of multiple objects. For example, the first indication information and the second indication information can be the same information or different information, and such a name does not indicate the difference in the content, size, application scenario, sender / receiver, priority or importance of the two messages. In addition, the numbering of the steps in the various embodiments introduced in the present application is only for distinguishing different steps, and is not used to limit the order of the steps.

[0113] The technical solution provided in the embodiment of the present application can be applied to wireless communication between communication devices. Wireless communication between communication devices may include: wireless communication between network devices and terminals, wireless communication between network devices and network devices, and wireless communication between terminals. In the embodiment of the present application, the term "wireless communication" may also be referred to as "communication", and the term "communication" may also be described as "data transmission", "information transmission" or "transmission".

[0114] It should be understood that the names of all nodes and messages in this application are merely names set for the convenience of description in this application. The names in the actual network may be different. This application should not be understood to limit the names of various nodes and messages. On the contrary, any name that has the same or similar function as the node or message used in this application is regarded as the method of this application or an equivalent replacement, and is within the scope of protection of this application, and will not be repeated below.

[0115] The various communication methods provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0116] It should be understood that the step numbers in the embodiments of the present application are only used for illustration and do not limit the order in which the steps occur.

[0117] Figure 2 A communication method 200 provided by the present application is shown. Figure 2 The method includes at least part of the following contents.

[0118] S210, TCI-state configuration, the network device sends RRC configuration signaling to the terminal device.

[0119] S220, TCI-state mapping, the network device sends MAC-CE signaling to the terminal device to establish an association between the TCI field value and the TCI-state.

[0120] S230, the terminal device switches from single TRP transmission mode to multi-TRP transmission mode.

[0121] S240, TCI-state indication, the network device sends DCI signaling to the terminal device, and indicates the specific TCI-state through the TCI field value in the DCI.

[0122] S201 to S203 are described in detail below.

[0123] It should be understood that the TCI-state corresponding to the TRP and the TCI-state of the TRP are equivalent. The TCI state corresponding to TRP1 can also be referred to as the first TCI-state, and a group of TCI-states corresponding to TRP1 can also be referred to as the first TCI-state group. The TCI state corresponding to TRP2 can also be referred to as the second TCI-state, and a group of TCI-states corresponding to TRP2 can also be referred to as the second TCI-state group. The TCI-states corresponding to the two TRPs can also be referred to as the first TCI-state and the second TCI-state. The two groups of TCI states corresponding to the two TRPs can also be referred to as the first TCI-state group and the second TCI-state group.

[0124] It should be understood that in this application, a group of TCI-states can also be understood as a TCI-state group.

[0125] S210, TCI-state configuration

[0126] The network device sends RRC configuration signaling to the terminal device. The RRC signaling is used to instruct the terminal device to use uplink and downlink joint TCI-state or uplink and downlink independent TCI-state for data transmission.

[0127] If the uplink and downlink joint TCI-state is used, it is also necessary to configure an uplink and downlink joint TCI-state set for it through RRC signaling.

[0128] If independent uplink and downlink TCI-states are used, an uplink TCI-state set and a downlink TCI-state set need to be configured through RRC signaling.

[0129] Among them, the downlink TCI-state is a beam shared by multiple downlink channels and / or reference signals; the uplink TCI-state is a beam shared by multiple uplink channels and / or reference signals; the uplink and downlink combined TCI-state is a beam shared by multiple uplink and downlink channels and / or reference signals. Therefore, the TCI-state here can also be called a unified TCI-state.

[0130] S220, TCI-state mapping

[0131] The network device sends a first MAC-CE signaling to the terminal device. The first MAC-CE signaling is introduced by the 3GPP R18 protocol and is used to indicate the correspondence between the TCI field value in the DCI and the TCI-state of the two TRPs. The first MAC-CE signaling is used to indicate the TCI-state corresponding to at least one TCI field value of the TCI field, wherein each TCI field value in the above at least one TCI field value corresponds to at most two groups of TCI-states, wherein each group of TCI-states corresponds to one TRP. The association relationship between the TCI field value in the DCI and one or two groups of TCI-states (wherein each group of TCI-states includes one or two TCI-states) is established through the first MAC-CE signaling. Each group of TCI-states here includes an uplink and downlink TCI-state, or each group of TCI-states includes an uplink TCI-state and / or a downlink TCI-state.

[0132] The following methods are described by taking a single 3-bit TCI field (a total of 8 TCI field values: 000, 001, 010, 011, 100, 101, 110, 111) included in the DCI as an example, and Table 1 or Table 2 shows the association relationship when a single 3-bit is included in two examples of DCI. The method in the present application is also applicable to scenarios where the TCI field length is not equal to 3 bits, for example, the TCI field length is equal to 4 bits.

[0133] It should be understood that the TCI field value 000 can also be understood as the TCI field value 0 or the first TCI field value, the TCI field value 001 can be understood as the TCI field value 1 or the second TCI field value, and so on.

[0134] Table 1

[0135]

[0136] Table 2

[0137]

[0138] S230, the terminal device switches from single TRP transmission mode to multi-TRP transmission mode.

[0139] The following method is described by taking the case where the number of TRPs is 2 (the number of TCI-state groups corresponding to each TCI field value is at most 2) as an example, and can be adaptively expanded for the case where the number of TRPs is greater than 2. For example, some 1-bit fields in the following method can be expanded into multiple bits to indicate the case where there are more than 2 TRPs.

[0140] In the following method, each TRP may correspond to a group of TCI-states, and each group of TCI-states may include a single or two TCI-states. If a single TCI-state is included, the TCI-state may be an uplink TCI-state, a downlink TCI-state, or an uplink and downlink combined TCI-state. If two TCI-states are included, the types of the two TCI-states are two opposite types, namely, an uplink TCI-state and a downlink TCI-state, respectively.

[0141] After the terminal device receives the above MAC-CE, if the first condition is met, the terminal device determines the two sets of TCI-states corresponding to the two TRPs (TRP1 and TRP2) and converts to multi-TRP transmission mode without further indication through DCI.

[0142] The first condition includes one or more of the following:

[0143] 1) Among all the TCI field values ​​indicated by the first MAC-CE, not all TCI-states mapped by the TCI field values ​​correspond to the same TRP. In other words, not all TCI-states mapped by the TCI field values ​​are TCI-states corresponding to TRP1, nor are all TCI-states mapped by the TCI field values ​​the TCI-states corresponding to TRP2.

[0144] Specifically, the at least one TCI field value indicated by the first MAC-CE includes at least one first TCI field value and at least one second TCI field value, the TCI-state corresponding to the first TCI field value includes the TCI-state of TRP1, and the TCI-state corresponding to the second TCI field value includes the TCI-state of TRP2.

[0145] For example, as shown in Table 1, some TCI field values ​​are mapped to the TCI-state corresponding to TRP1, and some TCI field values ​​are mapped to the TCI-state corresponding to TRP2.

[0146] For another example, as shown in Table 2, some TCI field value mappings include TCI-states of both TRP1 and TRP2.

[0147] The above condition may also be replaced by including at least one TCI field value indicated by the first MAC-CE and mapping at least one TCI field value to two groups of TCI-states of two TRPs.

[0148] 2) The terminal device only uses the TCI-state of a single TRP. For example, the terminal device currently uses the TCI-state of TRP1 or TRP2 for data transmission, that is, it is currently in single TRP transmission mode.

[0149] Specifically, each group of TCI-states includes an uplink TCI-state and a downlink TCI-state, or each group of TCI-states includes an uplink TCI-state and / or a downlink TCI-state.

[0150] The terminal device currently uses the TCI-state of TRP1 or TRP2 for data transmission, including: the terminal device currently uses an uplink and downlink TCI-state of TRP1 for data transmission, or the terminal device currently uses an uplink TCI-state and / or a downlink TCI-state of TRP1 for data transmission; or, the terminal device currently uses an uplink and downlink TCI-state of TRP2 for data transmission, or, the terminal device currently uses an uplink TCI-state and / or a downlink TCI-state of TRP2 for data transmission.

[0151] It should be understood that the first condition includes a combination of one or more of the above 1) and 2), that is, the first condition can be 1), can also be 2), or can be 1) and 2).

[0152] After the first condition is met, the terminal device determines two groups of TCI-states used by TRP1 and TRP2 through the first method or the second method, that is, determines a combined uplink and downlink TCI-state used by each TRP, or determines a downlink TCI-state and / or an uplink TCI-state used by each TRP. These two methods are introduced below.

[0153] First method

[0154] Determine at least one third TCI field value, the third TCI field value corresponds to a group of TCI-states of TRP1 and a group of TCI-states of TRP2; determine that a group of TCI-states of TRP1 and a group of TCI-states of TRP2 corresponding to the third field value with the smallest index or the largest index in at least one third field value are the above two groups of TCI-states.

[0155] Specifically, as shown in Table 2, two TCI-states corresponding to the smallest TCI field value among the TCI field values ​​that have a corresponding relationship with the TCI-states of the two TRPs are used.

[0156] For example, TCI field values ​​100 to 111 are all in correspondence with the TCI-states of the two TRPs. In this case, the two groups of TCI-states corresponding to the minimum TCI field value (100), namely TCI-states #2 and #5, are used as the TCI-states of the two TRPs.

[0157] Second method

[0158] Determine at least one fourth TCI field value and at least one fifth TCI field value, the fourth TCI field value corresponds to a group of TCI-states of TRP1, and the fifth TCI field value corresponds to a group of TCI-states of TRP2; determine that a group of TCI-states of TRP1 corresponding to a fourth field value with the smallest or largest index among at least one fourth field value and a group of TCI-states of TRP2 corresponding to a fifth field value with the smallest or largest index among at least one fifth field value are two groups of TCI-states.

[0159] Specifically, as shown in Table 1, for each TRP, the TCI-state corresponding to the smallest TCI field value among the TCI field values ​​that have a corresponding relationship with the TCI-state of the TRP is used as the TCI-state of the TRP.

[0160] For example, the TCI field values ​​corresponding to the TCI-state of TRP1 include 000, 010, 100 and 110, and the TCI-state corresponding to the minimum TCI field value (000) (i.e., #3) is used as the TCI-state of TRP1; the TCI field values ​​corresponding to the TCI-state of TRP2 include 001, 011, 101 and 111, and the TCI-state corresponding to the minimum TCI field value (001) (i.e., #6) is used as the TCI-state of TRP2.

[0161] In a possible implementation, when the second condition is met, the two groups of TCI-states are determined preferentially by the first method; when the second condition is not met, the two groups of TCI-states are determined by the second method. The second condition is: at least one TCI field value includes at least one third TCI field value, and the third TCI field value corresponds to a group of TCI-states of TRP1 and a group of TCI-states of TRP2.

[0162] It should be understood that if the network device configures the terminal device to use an uplink and downlink combined TCI-state, that is, each TRP uses an uplink and downlink combined TCI-state, the terminal device uses the first or second method mentioned above to determine the uplink and downlink combined TCI-state of the two TRPs.

[0163] If the network device configures the terminal device to use independent uplink and downlink TCI-states, that is, each TRP uses an uplink TCI-state and a downlink TCI-state, the terminal device uses the first or second method to determine the uplink TCI-state of the two TRPs, and uses the first or second method to determine the downlink TCI-state of the two TRPs.

[0164] Determine two sets of TCI-states used by two TRPs. The two sets of TCI-states can be used for data transmission. Specifically, one uplink and downlink TCI-state of the first TRP can be used for data transmission, or one uplink TCI-state and / or one downlink TCI-state of the first TRP can be used for data transmission; and one uplink and downlink TCI-state of the second TRP can be used for data transmission, or one uplink TCI-state and / or one downlink TCI-state of the second TRP can be used for data transmission.

[0165] S240, TCI-state indication.

[0166] TCI-state indication means that the network device sends DCI signaling to the terminal device, and the TCI field value in the DCI signaling indicates the TCI-state of one or two TRPs. Through step S220, an association relationship between any TCI field value and TCI-state can be established. If the first condition is met, the terminal device can also directly determine the TCI-state corresponding to the two TRPs. When the terminal device receives the TCI-state indicated by the DCI, since it is currently in multi-TRP transmission mode, the TCI-state currently used by the two TRPs can be updated.

[0167] Figure 34 is a schematic block diagram of a communication device 400 provided in an embodiment of the present application. The device 400 includes a transceiver unit 410 and a processing unit 420. The transceiver unit 410 can communicate with the outside, and the processing unit 420 is used for data processing. The transceiver unit 410 can also be called a communication interface or a communication unit.

[0168] In a possible implementation, the device 400 may further include a storage unit, which may be used to store instructions and / or data, and the processing unit 420 may read the instructions and / or data in the storage unit.

[0169] The device 400 can be used to execute the actions performed by the base station in the above method embodiment. In this case, the device 400 can be a base station or a component that can be configured in a base station. The transceiver unit 410 is used to execute the transceiver-related operations on the base station side in the above method embodiment, and the processing unit 420 is used to execute the processing-related operations on the base station side in the above method embodiment.

[0170] Alternatively, the device 400 can be used to execute the actions performed by the terminal device in the above method embodiment. In this case, the device 400 can be a terminal device or a component that can be configured in the terminal device, the transceiver unit 410 is used to execute the transceiver related operations on the terminal device side in the above method embodiment, and the processing unit 420 is used to execute the processing related operations on the terminal device side in the above method embodiment.

[0171] like Figure 4 As shown, the embodiment of the present application further provides a communication device 500. The communication device 500 includes a processor 510, the processor 510 is coupled to a memory 520, the memory 520 is used to store computer programs or instructions or and / or data, and the processor 510 is used to execute the computer programs or instructions and / or data stored in the memory 520, so that the method in the above method embodiment is executed.

[0172] In a possible implementation, the communication device 500 includes one or more processors 510.

[0173] In one possible implementation, Figure 4 As shown, the communication device 500 may further include a memory 7520 .

[0174] In a possible implementation, the communication device 500 may include one or more memories 520 .

[0175] In a possible implementation, the memory 520 may be integrated with the processor 510 or provided separately.

[0176] In one possible implementation, Figure 4As shown, the wireless communication device 500 may further include a transceiver 530, which is used to receive and / or send signals. For example, the processor 510 is used to control the transceiver 530 to receive and / or send signals.

[0177] As a solution, the communication device 500 is used to implement the operations performed by the base station in the above method embodiment.

[0178] For example, the processor 510 is used to implement the processing-related operations performed by the base station in the above method embodiment, and the transceiver 530 is used to implement the transceiver-related operations performed by the base station in the above method embodiment.

[0179] As another solution, the communication device 500 is used to implement the operations performed by the terminal device in the above method embodiment.

[0180] For example, the processor 510 is used to implement the processing-related operations performed by the terminal device in the above method embodiment, and the transceiver 530 is used to implement the sending and receiving-related operations performed by the terminal device in the above method embodiment.

[0181] The present application also provides a communication device 600, which can be a terminal device or a chip. The communication device 600 can be used to perform the operations performed by the terminal device in the above method embodiment. When the communication device 600 is a terminal device, Figure 5 A simplified schematic diagram of the structure of a terminal device is shown. For ease of understanding and illustration, Figure 5 In the example, a mobile phone is used as the terminal device. Figure 5 As shown, the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input-output device. The processor is mainly used to process communication protocols and communication data, as well as to control the terminal device, execute software programs, process software program data, etc. The memory is mainly used to store software programs and data. The radio frequency circuit is mainly used for conversion between baseband signals and radio frequency signals and processing of radio frequency signals. The antenna is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input-output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users. It should be noted that some types of terminal devices may not have input-output devices.

[0182] When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs the baseband signal to the RF circuit. The RF circuit performs RF processing on the baseband signal and then sends the RF signal outward in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor. The processor converts the baseband signal into data and processes the data. For ease of explanation, Figure 5 Only one memory and processor are shown in the figure. In an actual terminal device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device. The memory may be set independently of the processor or integrated with the processor, and the embodiments of the present application do not limit this.

[0183] In the embodiment of the present application, the antenna and the radio frequency circuit with transceiver functions can be regarded as the transceiver unit of the terminal device, and the processor with processing function can be regarded as the processing unit of the terminal device.

[0184] like Figure 5 As shown, the terminal device includes a transceiver unit 610 and a processing unit 620. The transceiver unit 610 may also be referred to as a transceiver, a transceiver, a transceiver device, etc. The processing unit 620 may also be referred to as a processor, a processing board, a processing module, a processing device, etc.

[0185] In a possible implementation, the device for implementing the receiving function in the transceiver unit 610 may be regarded as a receiving unit, and the device for implementing the sending function in the transceiver unit 610 may be regarded as a sending unit, that is, the transceiver unit 610 includes a receiving unit and a sending unit. The transceiver unit may also be sometimes referred to as a transceiver, a transceiver, or a transceiver circuit. The receiving unit may also be sometimes referred to as a receiver, a receiver, or a receiving circuit. The sending unit may also be sometimes referred to as a transmitter, a transmitter, or a transmitting circuit.

[0186] For example, in one implementation, the transceiver unit 610 is used to perform a receiving operation of the terminal device. The processing unit 620 is used to perform a processing action on the terminal device side.

[0187] It should be understood that Figure 5 This is only an example and not a limitation. The terminal device including the transceiver unit and the processing unit may not rely on Figure 5 The structure shown.

[0188] When the communication device 600 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip. The input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be output to a transmitter and transmitted by the transmitter, for example, but not limited to, and the input circuit and the output circuit may be different circuits or the same circuit. In this case, the circuit is used as an input circuit and an output circuit at different times.

[0189] The embodiment of the present application further provides a communication device 700, which can be a base station or a chip. The communication device 700 can be used to execute the operations executed by the base station in the above method embodiment.

[0190] When the communication device 700 is a base station. Figure 6 A simplified schematic diagram of the base station structure is shown. The base station includes a part 710 and a part 720. The part 710 is mainly used for receiving and transmitting radio frequency signals and converting radio frequency signals into baseband signals; the part 720 is mainly used for baseband processing, controlling the base station, etc. The part 710 can generally be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc. The part 720 is generally the control center of the base station, which can generally be referred to as a processing unit, and is used to control the base station to perform the processing operations on the network device side in the above method embodiment.

[0191] The transceiver unit of part 710 may also be referred to as a transceiver or a transceiver, etc., and includes an antenna and a radio frequency circuit, wherein the radio frequency circuit is mainly used for radio frequency processing. In a possible implementation, the device used to implement the receiving function in part 710 may be regarded as a receiving unit, and the device used to implement the sending function may be regarded as a sending unit, that is, part 710 includes a receiving unit and a sending unit. The receiving unit may also be referred to as a receiver, a receiver, or a receiving circuit, etc., and the sending unit may be referred to as a transmitter, a transmitter, or a transmitting circuit, etc.

[0192] Part 720 may include one or more boards, each of which may include one or more processors and one or more memories. The processor is used to read and execute programs in the memory to implement baseband processing functions and control of the base station. If there are multiple boards, each board can be interconnected to enhance processing capabilities. As an optional implementation, multiple boards may share one or more processors, or multiple boards may share one or more memories, or multiple boards may share one or more processors at the same time.

[0193] For example, in one implementation, the transceiver unit of part 710 is used to execute the transceiver-related steps executed by the base station in the embodiment; and part 720 is used to execute the processing-related steps executed by the base station.

[0194] It should be understood that Figure 6 This is only an example and not a limitation. The network device including the transceiver unit and the processing unit may not rely on Figure 6 The structure shown.

[0195] When the communication device 700 is a chip, the chip includes a transceiver unit and a processing unit. The transceiver unit may be an input / output circuit or a communication interface; the processing unit may be a processor or a microprocessor or an integrated circuit integrated on the chip. The input circuit may be an input pin, the output circuit may be an output pin, and the processing circuit may be a transistor, a gate circuit, a trigger, and various logic circuits. The input signal received by the input circuit may be received and input by, for example, but not limited to, a receiver, and the signal output by the output circuit may be output to a transmitter and transmitted by the transmitter, for example, but not limited to, and the input circuit and the output circuit may be different circuits or the same circuit. In this case, the circuit is used as an input circuit and an output circuit at different times.

[0196] An embodiment of the present application also provides a computer-readable storage medium on which computer instructions for implementing the method executed by a terminal device or a base station in the above method embodiment are stored.

[0197] For example, when the computer program is executed by a computer, the computer can implement the method executed by the terminal device or the method executed by the base station in the above method embodiment.

[0198] An embodiment of the present application also provides a computer program product comprising instructions, which, when executed by a computer, enables the computer to implement the method executed by a terminal device or a method executed by a network device in the above method embodiment.

[0199] An embodiment of the present application also provides a communication system, which includes the base station and terminal equipment in the above embodiment.

[0200] The explanation of the relevant contents and beneficial effects in any of the wireless communication devices provided above can refer to the corresponding method embodiments provided above, and will not be repeated here.

[0201] In an embodiment of the present application, a terminal device or a network device may include a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system layer. Among them, the hardware layer may include hardware such as a central processing unit (CPU), a memory management unit (MMU), and a memory (also called main memory). The operating system of the operating system layer may be any one or more computer operating systems that implement business processing through processes, such as Linux operating system, Unix operating system, Android operating system, iOS operating system, or Windows operating system. The application layer may include applications such as browsers, address books, word processing software, and instant messaging software.

[0202] The embodiments of the present application do not specifically limit the specific structure of the execution subject of the method provided in the embodiments of the present application, as long as it is possible to communicate according to the method provided in the embodiments of the present application by running a program that records the code of the method provided in the embodiments of the present application. For example, the execution subject of the method provided in the embodiments of the present application may be a terminal device or a base station, or a functional module in the terminal device or the base station that can call and execute a program.

[0203] Various aspects or features of the embodiments of the present application may be implemented as methods, devices, or products using standard programming and / or engineering techniques. The term "product" as used herein may cover a computer program accessible from any computer-readable device, carrier, or medium. For example, a computer-readable medium may include, but is not limited to: a magnetic storage device (e.g., a hard disk, a floppy disk, or a magnetic tape, etc.), an optical disk (e.g., a compact disc (CD), a digital versatile disc (DVD), etc.), a smart card, and a flash memory device (e.g., an erasable programmable read-only memory (EPROM), a card, a stick, or a key drive, etc.).

[0204] The various storage media described herein may represent one or more devices and / or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing and / or carrying instructions and / or data.

[0205] It should be understood that the processor mentioned in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0206] It should also be understood that the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM). For example, RAM can be used as an external cache. By way of example and not limitation, RAM may include the following forms: static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus RAM (DR RAM).

[0207] It should be noted that when the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, the memory (storage module) can be integrated into the processor.

[0208] It should also be noted that the memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0209] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present application.

[0210] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0211] In the several embodiments provided in the embodiments of the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0212] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0213] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0214] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program code.

[0215] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the embodiments of the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A communication method, characterized in that: The method is applied to a terminal device, and the method comprises: Receive a first medium access control-control unit MAC-CE signaling, where the first MAC-CE is used to indicate a transmission configuration indication-state TCI-state corresponding to at least one transmission configuration indication TCI field value, wherein each TCI field value in the at least one TCI field value corresponds to at most two TCI-state groups, and each TCI-state group corresponds to a transmission point TRP; When the first condition is met, two TCI-state groups are determined by the first method or the second method, the two TCI-state groups including the TCI-state group of the first TRP and the TCI-state group of the second TRP; Using the two TCI-state groups for data transmission; The first condition includes one or more of the following conditions: The at least one TCI field value includes at least one first TCI field value and at least one second TCI field value, the TCI-state group corresponding to the first TCI field value includes the TCI-state group corresponding to the first TRP, and the TCI-state group corresponding to the second TCI field value includes the TCI-state group corresponding to the second TRP, The terminal device currently uses the TCI-state group corresponding to the first TRP or the second TRP for data transmission.

2. The method according to claim 1, characterized in that Each TCI-state group includes an uplink TCI-state and a downlink TCI-state, or each TCI-state group includes an uplink TCI-state and / or a downlink TCI-state.

3. The method according to claim 2, characterized in that The terminal device currently uses the TCI-state group corresponding to the first TRP or the second TRP for data transmission, including: The terminal device currently uses one uplink and downlink TCI-state of the first TRP for data transmission, or the terminal device currently uses one uplink TCI-state and / or one downlink TCI-state of the first TRP for data transmission; or, The terminal device currently uses an uplink and downlink TCI-state of the second TRP for data transmission, or the terminal device currently uses an uplink TCI-state and / or a downlink TCI-state of the second TRP for data transmission.

4. The method according to claim 2 or 3, characterized in that: The adopting the two TCI-state groups to perform data transmission includes: Using one uplink and downlink TCI-state of the first TRP for data transmission, or using one uplink TCI-state and / or one downlink TCI-state of the first TRP for data transmission; and, An uplink or downlink TCI-state of the second TRP is used for data transmission, or an uplink TCI-state and / or a downlink TCI-state of the second TRP is used for data transmission.

5. The method according to any one of claims 2 to 4, characterized in that The first method is: Determine at least one third TCI field value, the TCI-state group corresponding to the third TCI field value includes the TCI-state group of the first TRP and the TCI-state group of the second TRP; Determine that the TCI-state group of the first TRP and the TCI-state group of the second TRP corresponding to the third field value with the smallest index in the at least one third field value are the two TCI-state groups.

6. The method according to any one of claims 2 to 5, characterized in that The second method is: Determine at least one fourth TCI field value and at least one fifth TCI field value, the TCI-state group corresponding to the fourth TCI field value includes the TCI-state group corresponding to the first TRP, and the TCI-state corresponding to the fifth TCI field value includes the TCI-state group of the second TRP; Determine the TCI-state group of the first TRP corresponding to the fourth field value with the smallest index in the at least one fourth field value and the TCI-state group of the second TRP corresponding to the fifth field value with the smallest index in the at least one fifth field value as the two TCI-state groups.

7. The method according to any one of claims 2 to 6, characterized in that Two groups of TCI-states are determined by the first method or the second method, including: When the second condition is met, determining the two TCI-state groups by the first method; When the second condition is not met, determining the two TCI-state groups by the second method; The second condition is that the at least one TCI field value includes at least one third TCI field value, and the TCI-state group corresponding to the third TCI field value includes the TCI-state group of the first TRP and the TCI-state group of the second TRP.

8. A communication method, characterized in that: The method is applied to a network device, the network device currently uses a TCI-state group corresponding to a first TRP or a second TRP for data transmission, and the method includes: Sending a first medium access control-control unit MAC-CE signaling, where the first MAC-CE is used to indicate a transmission configuration indication-state TCI-state corresponding to at least one transmission configuration indication TCI field value, wherein each TCI field value in the at least one TCI field value corresponds to at most two TCI-state groups, each TCI-state group corresponds to a transmission point TRP, the at least one TCI field value includes at least one first TCI field value and at least one second TCI field value, the TCI-state group corresponding to the first TCI field value includes the TCI-state group corresponding to the first TRP, and the TCI-state group corresponding to the second TCI field value includes the TCI-state group corresponding to the second TRP; Two TCI-state groups are used for data transmission, and the two TCI-state groups are determined by the terminal device. The two TCI-state groups include the TCI-state group of the first TRP and the TCI-state group of the second TRP.

9. The method according to claim 8, characterized in that Each TCI-state group includes an uplink TCI-state and a downlink TCI-state, or each TCI-state group includes an uplink TCI-state and / or a downlink TCI-state.

10. The method according to claim 8 or 9, characterized in that: The network device currently uses the TCI-state group corresponding to the first TRP or the second TRP for data transmission, including: The network device currently uses an uplink and downlink TCI-state of the first TRP for data transmission, or the terminal device currently uses an uplink TCI-state and / or a downlink TCI-state of the first TRP for data transmission; or, The network device currently uses an uplink and downlink TCI-state of the second TRP for data transmission, or the terminal device currently uses an uplink TCI-state and / or a downlink TCI-state of the second TRP for data transmission.

11. The method according to any one of claims 8 to 10, characterized in that The adopting the two TCI-state groups to perform data transmission includes: Using one uplink and downlink TCI-state of the first TRP for data transmission, or using one uplink TCI-state and / or one downlink TCI-state of the first TRP for data transmission; and, An uplink or downlink TCI-state of the second TRP is used for data transmission, or an uplink TCI-state and / or a downlink TCI-state of the second TRP is used for data transmission.

12. The method according to any one of claims 8 to 11, characterized in that The two TCI-state groups are the TCI-state group of the first TRP and the TCI-state group of the second TRP corresponding to the third field value with the smallest index in at least one third field value, and the TCI-state group corresponding to the third TCI field value includes the TCI-state group of the first TRP and the TCI-state group of the second TRP.

13. The method according to any one of claims 8 to 12, characterized in that The two TCI-state groups are the TCI-state group of the first TRP corresponding to the fourth field value with the smallest index in at least one fourth field value and the TCI-state group of the second TRP corresponding to the fifth field value with the smallest index in at least one fifth field value. The TCI-state group corresponding to the fourth TCI field value includes the TCI-state group corresponding to the first TRP, and the TCI-state corresponding to the fifth TCI field value includes the TCI-state group of the second TRP.

14. A communication device, characterized in that: include: A transceiver unit, configured to receive a first medium access control-control unit MAC-CE signaling, wherein the first MAC-CE is used to indicate a transmission configuration indication-state TCI-state corresponding to at least one transmission configuration indication TCI field value, wherein each TCI field value in the at least one TCI field value corresponds to at most two TCI-state groups, and each TCI-state group corresponds to a transmission point TRP; A processing unit, configured to determine two TCI-state groups by a first method or a second method, wherein the two TCI-state groups include a TCI-state group of a first TRP and a TCI-state group of a second TRP; The transceiver unit is further used to use the TCI-state group of the first TRP or the second TRP for data transmission; The transceiver unit is also used to use the two TCI-state groups to perform data transmission.

15. The device according to claim 14, characterized in that Each TCI-state group includes an uplink and downlink TCI-state, or each TCI-state group includes an uplink TCI-state and / or a downlink TCI-state.

16. The device according to claim 15, characterized in that The transceiver unit is further configured to use the TCI-state group of the first TRP or the second TRP for data transmission, including: The transceiver unit is further configured to use an uplink or downlink TCI-state of the first TRP for data transmission, or The transceiver unit is further configured to use an uplink TCI-state and / or a downlink TCI-state of the first TRP for data transmission; or, The transceiver unit is further configured to use an uplink or downlink TCI-state of the second TRP for data transmission, or The transceiver unit is also used to use an uplink TCI-state and / or a downlink TCI-state of the second TRP for data transmission.

17. The device according to claim 15 or 16, characterized in that The transceiver unit is further configured to use the two TCI-state groups for data transmission, including: The transceiver unit is further configured to use an uplink or downlink TCI-state of the first TRP for data transmission, or The transceiver unit is further configured to use an uplink TCI-state and / or a downlink TCI-state of the first TRP for data transmission; and The transceiver unit is further configured to use an uplink or downlink TCI-state of the second TRP for data transmission, or The transceiver unit is also used to use an uplink TCI-state and / or a downlink TCI-state of the second TRP for data transmission.

18. The device according to any one of claims 15 to 17, characterized in that The first method is: Determine at least one third TCI field value, the TCI-state group corresponding to the third TCI field value includes the TCI-state group of the first TRP and the TCI-state group of the second TRP; Determine that the TCI-state group of the first TRP and the TCI-state group of the second TRP corresponding to the third field value with the smallest index in the at least one third field value are the two TCI-state groups.

19. The device according to any one of claims 15 to 18, characterized in that The second method is: Determine at least one fourth TCI field value and at least one fifth TCI field value, the TCI-state group corresponding to the fourth TCI field value includes the TCI-state group corresponding to the first TRP, and the TCI-state corresponding to the fifth TCI field value includes the TCI-state group of the second TRP; Determine the TCI-state group of the first TRP corresponding to the fourth field value with the smallest index in the at least one fourth field value and the TCI-state group of the second TRP corresponding to the fifth field value with the smallest index in the at least one fifth field value as the two TCI-state groups.

20. The device according to any one of claims 15 to 19, characterized in that When the second condition is met, the processing unit determines the two TCI-state groups by the first method; When the second condition is not met, the processing unit determines the two TCI-state groups by the second method; The second condition is that the at least one TCI field value includes at least one third TCI field value, and the TCI-state group corresponding to the third TCI field value includes the TCI-state group of the first TRP and the TCI-state group of the second TRP.

21. A communication device, characterized in that: The device comprises: A transceiver unit, configured to send a first medium access control-control unit MAC-CE signaling, wherein the first MAC-CE is used to indicate a transmission configuration indication-state TCI-state corresponding to at least one transmission configuration indication TCI field value, wherein each TCI field value in the at least one TCI field value corresponds to at most two TCI-state groups, each TCI-state group corresponds to a transmission point TRP, the at least one TCI field value includes at least one first TCI field value and at least one second TCI field value, the TCI-state group corresponding to the first TCI field value includes the TCI-state group corresponding to the first TRP, and the TCI-state group corresponding to the second TCI field value includes the TCI-state group corresponding to the second TRP, The transceiver unit is further used to use the TCI-state group corresponding to the first TRP or the second TRP for data transmission; The transceiver unit is also used to use two TCI-state groups for data transmission, and the two TCI-state groups are determined by the terminal device through the first method or the second method. The two TCI-state groups include the TCI-state group of the first TRP and the TCI-state group of the second TRP.

22. The method according to claim 21, characterized in that Each TCI-state group includes an uplink TCI-state and a downlink TCI-state, or each TCI-state group includes an uplink TCI-state and / or a downlink TCI-state.

23. The method according to claim 21 or 22, characterized in that The transceiver unit is also used to currently use the TCI-state group corresponding to the first TRP or the second TRP for data transmission, including: The transceiver unit is further configured to use an uplink or downlink TCI-state of the first TRP for data transmission, or the terminal device currently uses an uplink TCI-state and / or a downlink TCI-state of the first TRP for data transmission; or, The transceiver unit is also used to use an uplink and downlink TCI-state of the second TRP for data transmission, or the terminal device currently uses an uplink TCI-state and / or a downlink TCI-state of the second TRP for data transmission.

24. The method according to any one of claims 21 to 23, characterized in that The transceiver unit is further configured to use the two TCI-state groups for data transmission, including: The transceiver unit is further configured to use an uplink or downlink TCI-state of the first TRP for data transmission, or use an uplink TCI-state and / or a downlink TCI-state of the first TRP for data transmission; and The transceiver unit is also used to use an uplink and downlink TCI-state of the second TRP for data transmission, or use an uplink TCI-state and / or a downlink TCI-state of the second TRP for data transmission.

25. The method according to any one of claims 21 to 24, characterized in that: The two TCI-state groups are the TCI-state group of the first TRP and the TCI-state group of the second TRP corresponding to the third field value with the smallest index in at least one third field value, and the TCI-state group corresponding to the third TCI field value includes the TCI-state group of the first TRP and the TCI-state group of the second TRP.

26. The method according to any one of claims 24 to 25, characterized in that The two TCI-state groups are the TCI-state group of the first TRP corresponding to the fourth field value with the smallest index in at least one fourth field value and the TCI-state group of the second TRP corresponding to the fifth field value with the smallest index in at least one fifth field value. The TCI-state group corresponding to the fourth TCI field value includes the TCI-state group corresponding to the first TRP, and the TCI-state corresponding to the fifth TCI field value includes the TCI-state group of the second TRP.

27. A communication device, characterized in that: include: A unit for implementing the method of any one of claims 1 to 7; or a unit for implementing the method of any one of claims 8 to 13.

28. A computer-readable storage medium, characterized in that: The computer readable storage medium stores a computer program. When the computer program is executed, Execute the method according to any one of claims 1 to 7, or Execute the method as claimed in any one of claims 8 to 13.

29. A chip system, characterized in that: comprising: a processor for calling and running a computer program from a memory, Execute the method according to any one of claims 1 to 7; or Execute the method as claimed in any one of claims 8 to 13.

30. A communication system, characterized in that: The method comprises a terminal device and a network device, wherein the terminal device is used to execute the method according to any one of claims 1 to 7, and the network device is used to execute the method according to any one of claims 8 to 13.

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